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Title: Evanescent-wave-excited quasi-two-dimensional random lasing
Authors: Mujumdar, Sushil
Ramachandran, Hema
Kumar, N.
Sood, A.K.
Issue Date: 15-Sep-2006
Publisher: Optical Society of America
Citation: Optics Letters, 2006, Vol. 31, p2722-2724
Abstract: We report on random lasing from a dye-scatterer system directly excited by evanescent modes formed over a dielectric-dielectric interface. The system is quasi-two-dimensional because of the subwavelength exponential decay of the excitation energy. Spectral narrowing by a factor of ∼13 was obtained under diffusive scattering conditions. The peak intensity exhibited a unique dual-saturation behavior due to the localized nature of the excitation. We observed a reduction of threshold for samples with a higher dye concentration because of a larger excitation-state occupation number within the same interaction volume.
Description: Restricted Access.
ISSN: 0146-9592
1539-4794 (Online)
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Copyright: 2006 Optical Society of America
Appears in Collections:Research Papers (TP)
Research Papers (LAMP)

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